Invention Grant
US08524961B2 Integrated catalytic cracking and reforming processes to improve p-xylene production 有权
综合催化裂化和重整方法改善对二甲苯生产

  • Patent Title: Integrated catalytic cracking and reforming processes to improve p-xylene production
  • Patent Title (中): 综合催化裂化和重整方法改善对二甲苯生产
  • Application No.: US13269096
    Application Date: 2011-10-07
  • Publication No.: US08524961B2
    Publication Date: 2013-09-03
  • Inventor: Robert HaizmannLaura E. Leonard
  • Applicant: Robert HaizmannLaura E. Leonard
  • Applicant Address: US IL Des Plaines
  • Assignee: UOP LLC
  • Current Assignee: UOP LLC
  • Current Assignee Address: US IL Des Plaines
  • Agent Mark R Willis
  • Main IPC: C07C7/00
  • IPC: C07C7/00 C10G57/00 C10G55/02
Integrated catalytic cracking and reforming processes to improve p-xylene production
Abstract:
A process for maximizing p-xylene production includes producing a naphtha fraction and a light cycle oil fraction from a fluid catalytic cracking zone. These fractions are combined and hydrotreated. Fractionation of the hydrotreated product makes a hydrocracker feed that is sent to a hydrocracking zone to make a naphtha cut and a hydrocracker product. The hydrocracker product is recycled back to the fractionation zone, and the naphtha cut is dehydrogenated in a dehydrogenation zone to make aromatics. Reforming catalyst from a catalyst regenerator moves downward through the dehydrogenation zone. Straight run naphtha and raffinate from the aromatics unit are introduced to an additional series of reforming zones. The reforming catalyst moves in parallel through the first reforming zone and the dehydrogenation zones, then is combined for entry to the second and subsequent reforming zones prior to regeneration.
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